<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
</head>

<body>
	<script>
		// function fn() {
		// 	this.user = 'xxx';
		// 	return { user1: '老陈' };
		// }
		// var a = new fn();
		// console.log(a)
		// console.log(a.user);


		function fn() {
			this.user = 'xxx';
			return 123;
		}
		var a = new fn();
		console.log(a)
		console.log(a.user);
	</script>
</body>

</html>